Stepper

ABSTRACT

A stepper includes a base, a linking rod, two pedals and two mechanisms. The linking rod is disposed on the base. Each of the adjusting mechanism includes a blocking member, an adjusting base and an eccentric member. The blocking member includes a first blocking surface. The adjusting base is disposed on the base. The eccentric member is rotatably disposed on the adjusting base and includes at least two second blocking surfaces. The two second blocking surfaces selectively resist the first blocking surface. When one of the pedals is lowered, one of the first blocking surfaces and one of the second blocking surfaces are inclined to link up one end of the linking rod, and the other end of the linking rod is concentrically rotated, and the other first blocking surface is resisted by the other second blocking surface, thereby rotating and raising the other pedal.

RELATED APPLICATIONS

The application claims priority to Taiwan Application Serial Number104204233, filed on Mar. 20, 2015, which is herein incorporated byreference.

BACKGROUND

1. Technical Field

The present disclosure relates to a stepper. More particularly, thepresent disclosure relates to a stepper capable of adjusting a pedalstroke and a swing angle.

2. Description of Related Art

Owing to the changes of job types, most people do static indoor jobs,and the jobs requiring physical labors have been replaced by automaticmachines. Therefore, the muscles of the human body may lack of exercise,thus resulting in long-term adverse effects on health.

In view of this, indoor fitness equipment is presented to the market forallowing people to do exercise anytime and anywhere, in which a stepperis used to mimic stair climbing or walking uphill to train foot muscles,thereby reaching the purpose of working out and obtaining a healthybody.

However, a conventional stepper has complicated linking structure, theworking paths of the left pedal and the right pedal are fixed, and thusthe pedal stroke and the swing angle cannot be adjusted. Therefore, theconventional stepper cannot meet requirements of different users.

SUMMARY

According to one aspect of the present disclosure, a stepper isprovided. The stepper includes a base, a linking rod, two pedals and twoadjusting mechanisms. The linking rod is disposed on the base, whereinthe linking rod includes two ends that are concentrically rotated witheach other. Each of the pedals includes a pedal member and a pedal arm.The pedal arm is connected to the pedal member, wherein the pedal arm ispivotally connected to one end of the linking rod for reciprocatelyraising or lowering the pedal member. Each of the adjusting mechanismincludes a blocking member, an adjusting base and an eccentric member.The blocking member is disposed on the pedal arm, and the blockingmember includes a first blocking surface. The adjusting base is disposedon the base. The eccentric member is disposed on the adjusting base andis rotatable around an axial center. The eccentric member includes atleast two second blocking surfaces, and the two second blocking surfacesare separated from the axial center by different distances, and the twosecond blocking surfaces selectively resist the first blocking surface.When one of the pedals is lowered, one of the first blocking surfacesand one of the second blocking surfaces are inclined to link up one endof the linking rod, and the other end of the linking rod isconcentrically rotated, and the other first blocking surface is resistedby the other second blocking surface, thereby rotating and raising theother pedal.

According to another aspect of the present, a stepper is provided. Thestepper includes a base, a linking rod, two pedals, and two adjustingmechanisms. The linking rod is disposed on the base, wherein the linkingrod includes two ends that are concentrically rotated with each other.Each of the pedals includes a pedal member and a pedal arm. The pedalarm is connected to the pedal member, wherein the pedal arm is pivotallyconnected with one end of the linking rod for reciprocately raising orlowering the pedal member. Each of the adjusting mechanism includes ablocking member, an adjusting base and an eccentric member. The blockingmember is disposed on the pedal arm, and the blocking member includes afirst blocking surface. The adjusting base is disposed on the base. Theeccentric member is disposed on the adjusting base and is rotatablearound an axial center. The eccentric member includes a second blockingsurface, and the second blocking surface selectively resists the firstblocking surface of the blocking member. The adjusting member isdisposed on the adjusting base for adjusting a rotating angle or aposition of the eccentric member. When one of the pedals is lowered, oneof the first blocking surfaces and one of the second blocking surfacesare inclined to link up one end of the linking rod, and the other end ofthe linking rod is concentrically rotated, and the other first blockingsurface is resisted by the other second blocking surface, therebyswinging and raising the other pedal.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1 is a three-dimensional view showing a stepper according to oneembodiment of the present disclosure;

FIG. 2 is an exploded view of the stepper of FIG. 1;

FIG. 3 is a side view of the stepper of FIG. 1;

FIG. 4A is a schematic view showing a first distance between a secondblocking surface and an axial center of FIG. 3;

FIG. 4B is a schematic view showing a second distance between the secondblocking surface and the axial center of FIG. 3;

FIG. 4C is a schematic view showing a third distance between the secondblocking surface and the axial center of FIG. 3;

FIG. 4D is a schematic view showing a fourth distance between the secondblocking surface and the axial center of FIG. 3;

FIG. 5A is a schematic view showing an operation of the stepper of FIG.4A;

FIG. 5B is a schematic view showing an operation of the stepper of FIG.4B;

FIG. 5C is a schematic view showing an operation of the stepper of FIG.4C;

FIG. 5D is a schematic view showing an operation of the stepper of FIG.4D;

FIG. 6A is a schematic view showing that an eccentric member has threesecond blocking surfaces;

FIG. 6B is a schematic view showing that the eccentric member has fivesecond blocking surfaces;

FIG. 6C is a schematic view showing that the eccentric member has sixsecond blocking surfaces;

FIG. 7 is a three-dimensional view showing a stepper according to oneembodiment of the present disclosure;

FIG. 8 is an exploded view of the stepper of FIG. 7;

FIG. 9 is a side view of the stepper of FIG. 8;

FIG. 10A is a schematic view showing an action of the stepper of FIG. 8;

FIG. 10B is a schematic view showing an action of one side of thestepper of FIG. 10A;

FIG. 10C is a schematic view showing an action of the other side of thestepper of FIG. 10A;

FIG. 11A is a three-dimensional view showing a stepper according toanother embodiment of the present disclosure;

FIG. 11B is a side view of the stepper of FIG. 11A;

FIG. 12A is a three-dimensional view showing a stepper according tostill another embodiment of the present disclosure;

FIG. 12B is a side view of the stepper of FIG. 12A;

FIG. 13 is a three-dimensional view showing a stepper according tofurther another embodiment of the present disclosure;

FIG. 14 is an exploded view of the stepper of FIG. 13;

FIG. 15 is a side view of the stepper of FIG. 14;

FIG. 16A is a three-dimensional view showing a stepper according to oneembodiment of the present disclosure;

FIG. 16B is a side view of the stepper of FIG. 16A;

FIG. 17A is a schematic view showing a stepper according to oneembodiment of the present disclosure; and

FIG. 17B is a side view of the stepper of FIG. 17A.

DETAILED DESCRIPTION

Reference will now be made in detail to the present embodiments of thedisclosure, examples of which are illustrated in the accompanyingdrawings. Wherever possible, the same reference numbers are used in thedrawings and the description to refer to the same or like parts.

The present disclosure provides a stepper being capable of adjusting thepedal stroke, the swing amplitude, and the swing angle that areun-adjustable in a conventional stepper. Therefore, the stepper of thepresent disclosure can be adjusted to meet requirements of differentusers.

FIG. 1 is a three-dimensional view showing a stepper 100 according toone embodiment of the present disclosure; FIG. 2 is an exploded view ofthe stepper 100 of FIG. 1; and FIG. 3 is a side view of the stepper 100of FIG. 1. The stepper 100 includes a base 200, a linking rod 300, twopedals 202, two adjusting mechanisms 500 and two recovering mechanisms600.

The base 200 is stably placed on a plane. The base 200 includes acentral portion 210, an extension portion 220 and two side portions 230.The extension portion 200 is extended vertically and outwardly from thecentral portion 210. The two side portions 230 are connected to two endsof the central portion 210 respectively, and the two side portions 230are hollow and are arranged in a shape of splayed arch.

The linking rod 300 is pivotally disposed on the base 200, and theliking rod 300 includes two ends 310 that are concentrically rotatedwith each other and a circle center portion 320. The circle centerportion 320 is located at the center of the linking rod 300, and thecircle center portion 320 is pivotally connected to an outer end of theextension portion 220 by a pivot axis 330, thereby rotating the linkingrod 300 relative to the base 200.

Each of the pedals 400 includes a pedal member 410, a pedal arm 420 anda pivoting portion 430. The pedal member 410 is used for stamping. Thepedal arm 420 is “L” shaped and is connected to the pedal member 410.The pivoting portion 430 is integrally connected to the pedal arm 420,and each of the pivoting portions 430 is pivotally connected to two ends310 of the linking rod 300, such that the pedal arm 420 can be rotatedrelative to the linking rod 300 for reciprocately raising or loweringthe pedal member 410.

Each of the adjusting mechanisms 500 includes a blocking member 510, anadjusting base 520 and an eccentric member 550. Two blocking members 510are disposed on the two pedal arms 420 respectively. The blocking member510 includes a first blocking surface 511. In the embodiment, the firstblocking surface 511 can be an arc surface, and the first blockingsurface 511 can be made from elastic material. The adjusting base 520 isdisposed on the central portion 210 of the base 200. Each of theeccentric members 500 is disposed on the adjusting base 520 and isrotated around an axial center C. The eccentric member 550 includes atleast two second blocking surfaces 551 for resisting the first blockingsurface 511 of the blocking member 510. In the embodiment, the eccentricmember 550 includes four second blocking surfaces 551.

Each of the recovering mechanisms 600 is located at the two sideportions 230. Each of the recovering mechanism 600 is connected to twoends 310 of the linking rod 300 and the base 200. In this embodiment,the recovering mechanism 600 includes a connecting bar 610 and a tensionspring 620. One end of the connecting bar 610 is connected to one end310 of the linking rod 300, and the other end of the connecting bar 610is connected to the tension spring 620. The recovering force can also beprovided by using a compression spring, a steel cable, a pneumaticcylinder or an oil cylinder.

When the pedal 400 is stamped, the first blocking surface 511 of theblocking member 510 disposed on the pedal 400 is resisted by the secondblocking surface 551 of the eccentric member 550, and thus two ends 310of the linking rod 300 are concentrically rotated. Meanwhile, the firstblocking surface 511 of the other blocking member 510 is resisted by thesecond blocking surface 551 of the other eccentric member 550, therebyraising the other pedal 400. Therefore, the left pedal 400 or the rightpedal 400 can be moved up and down through concentrically rotating thelinking rod 300 and resisting the blocking member 510 and the eccentricmember 550.

In more detail, when different second blocking surfaces 551corresponding to different axial distances in the eccentric member 550are selected, the pedal stroke and the swing angle of the pedal 400 canbe adjusted. Please refer to FIG. 2A, FIGS. 4A to 4D, and FIGS. 5A to5D. FIG. 4A is a schematic view showing that a first distance d1 betweenthe second blocking surface 551 and the axial center C; FIG. 4B is aschematic view showing that a second distance d2 between the secondblocking surface 551 and the axial center C; FIG. 4C is a schematic viewshowing that a third distance d3 between the second blocking surface 551and the axial center C; FIG. 4D is a schematic view showing that afourth distance d4 between the second blocking surface 551 and the axialcenter C; FIG. 5A is a schematic view showing an operation of thestepper 100 of FIG. 4A; FIG. 5B is a schematic view showing an operationof the stepper 100 of FIG. 4B; FIG. 5C is a schematic view showing anoperation of the stepper 100 of FIG. 4C; and FIG. 5D is a schematic viewshowing an operation of the stepper 100 of FIG. 4D. The pedal member isneglected and not shown in FIGS. 4A to 4D and FIGS. 5A to 5D for briefdescription.

In this embodiment, the number of the second blocking surfaces 551 isfour, and the distances between each of the second blocking surfaces 551and the axial center C are a first distance d1, a second distance d2, athird distance d3 and a fourth distance d4 respectively. The firstdistance d1 is the shortest, and the other distances are increased insequence, and the fourth distance d4 is the longest. When the stepper100 is operated, since the first distance d1, the second distance d2,the third distance d3 and the fourth distance d4 are different, thestrokes of the pedal arm 420 are different. Therefore, in FIG. 5A, thepedal arm 420 has the smallest stroke, and by contrast, in FIG. 5D, thepedal arm 420 has the largest stroke.

FIG. 6A is a schematic view showing that the eccentric member has threesecond blocking surfaces; FIG. 6B is a schematic view showing that theeccentric member has five second blocking surfaces; and FIG. 6C is aschematic view showing that the eccentric member has six second blockingsurfaces. In FIGS. 6A to 6C, it is shown that the number of the secondblocking surface 551 of the eccentric member 550 can be changed tochange the pedal stroke. When the distance between the second blockingsurface 551 and the axial center C is changed, not only the pedal strokeis changed, but also the swing angle is changed.

FIG. 7 is a three-dimensional view showing a stepper 100 according toone embodiment of the present disclosure; FIG. 8 is an exploded view ofthe stepper 100 of FIG. 7; and FIG. 9 is a side view of the stepper 100of FIG. 8. The stepper 100 includes a base 200, a linking rod 300, twopedals 400, and two adjusting mechanisms 500.

The base 200 is stably placed on a plane.

The linking rod 300 is pivotally disposed on the base 200, and thelinking rod 200 includes two ends 310 that are concentrically rotatedwith each other.

Each of the pedals 400 includes a pedal member 410, a pedal arm 420 anda pivoting portion 430. The pedal member 410 is used for stamping. Thepedal arm 420 is “L” shaped and is connected to the pedal member 410.The pivoting portion 430 is integrally connected to the pedal arm 420,and each of the pivoting portions 430 is pivotally connected to two ends310 of the linking rod 300, such that the pedal arm 420 can be rotatedrelative to the linking rod, thereby reciprocately raising or loweringthe pedal member 410.

Each of the adjusting mechanism 500 includes a blocking member 510, anadjusting base 520, an adjusting sheet 530, an adjusting member 540, aneccentric member 550 and two screws 560. The blocking members 510 isdisposed on the two pedal arms 420. The blocking member 510 includes afirst blocking surface 511. In the embodiment, the first blockingsurface 511 can be an are surface, and the first blocking surface 511can be made from elastic material. The adjusting base 520 is disposed onthe base 200, and the adjusting base 520 has a plurality of adjustingholes 521. The adjusting sheet 530 has a plurality of fixing holes 531.The adjusting member 540 is actively disposed in the adjusting hole 521of the adjusting base 520 and the fixing hole 531 of the adjusting sheet530. The eccentric member 550 is adjustably disposed on the adjustingbase 520 through the adjusting member 540, the fixing hole 531 and theadjusting hole 521. The eccentric member 550 includes a second blockingsurface 551 for resisting the first blocking surface 511 of the blockingmember 510. Two screws 560 are disposed through two fixing holes 531 andtwo adjusting holes 521, and stop the eccentric member 550 and theadjusting sheet 530. In this embodiment, the adjusting member 540 can bea bolt or a plug. The positions and the number of the adjusting hole521, the fixing hole 531 and the screw 560 corresponding to theadjusting hole 521 and the fixing hole 531 are not limited.

Please refer to FIG. 8 and FIGS. 10A to 10C. FIG. 10A is a schematicview showing an action of the stepper 100 of FIG. 8; FIG. 10B is aschematic view showing an action of one side of the stepper 100 of FIG.10A; and FIG. 10C is a schematic view showing an action of the otherside of the stepper 100 of FIG. 10A. The adjusting member 540 isselectively disposed through two adjusting holes 521 and two fixingholes 531, different adjusting hole 521 and fixing hole 531 will leaddifferent inclining angles of the adjusting sheet 530 and differentangles of the eccentric member 550, thereby adjusting pedal stroke andswing angle of the pedal 400. In more detail, when a pedal 400 islowered along a gravity direction g, the first blocking surface 511 ofthe blocking member 510 and the second blocking surface 551 of theeccentric member 550 are inclined along the gravity direction g, therebyforcing two ends 310 of the linking rod 300 to be concentricallyrotated. Meanwhile, the second blocking surface 551 of the othereccentric member 550 inclinedly resists the first blocking surface 511of the other blocking member 511, thereby raising the other pedal 400.Therefore, the pedal 400 can swing up, down, left or right byconcentrically rotating the linking rod 300 and resisting the eccentricmember 550 and the blocking member 510.

It should be emphasized that, through the limitation of the eccentricmember 550 and the blocking member 510, the pedal 400 can swing up,down, left, and right. Moreover, by disposing different adjusting hole521 and fixing hole 531 through the adjusting member 540, the angle atwhich the eccentric member 550 resists the blocking member 510 can beadjusted for adjusting the pedal stroke and the swing angle. People mayadjust the adjusting base 520, the adjusting sheet 530, the adjustingmember 540, the eccentric member 550 and the screw 560 in accordancewith different pedal strokes and swing angles.

FIG. 11A is a three-dimensional view showing a stepper according toanother embodiment of the present disclosure; and FIG. 11B is a sideview of the stepper of FIG. 11A. In FIGS. 11A and 11B, the pedal memberis neglected for brief description. In FIGS. 11A and 11B, the adjustingmechanism 500 removes the adjusting sheet 530 in FIG. 8, and theadjusting member 540 is directly disposed through the adjusting hole 521of the adjusting base 520 and the eccentric member 550. Since theadjusting holes 521 are arranged in accordance with different heights, adifferent height position of the eccentric member 550 can be adjusted byadjusting different adjusting holes 521, thereby changing the height atwhich the second blocking surface 551 of the eccentric member 550resists the first blocking surface 511 of the blocking member 510. Thus,the pedal stroke and the swing angle of the pedal arm 420 can bechanged.

FIG. 12A is a three-dimensional view showing a stepper 100 according tostill another embodiment of the present disclosure; and FIG. 12B is aside view of the stepper 100 of FIG. 12A. In FIGS. 11A and 11B, theadjusting mechanism 500 removes the adjusting sheet 530 in FIG. 8, andthe adjusting member 540 is directly disposed through the adjusting hole521 of the adjusting base 520 and the eccentric member 550. Since theadjusting holes 521 are arranged horizontally, different horizontalpositions of the eccentric member 550 can be adjusted by adjustingdifferent adjusting holes 521, thereby changing the distance when thesecond blocking surface 551 of the eccentric member 550 resists thefirst blocking surface 511 of the blocking member 510. Thus, the pedalstroke and the swing angle of the pedal arm 420 can be changed.

FIG. 13 is a three-dimensional view showing a stepper 100 a according tofurther another embodiment of the present disclosure; FIG. 14 is aexploded view showing the stepper 100 a of FIG. 13; and FIG. 15 is aside view showing the stepper 100 a of FIG. 14. In FIG. 15, the pedalmember is neglected. In this embodiment, only the adjusting mechanism500 a is changed, the base 200 a, the linking rod 300 a and the twopedals 400 a are similar to the aforementioned embodiments.

The adjusting mechanism 500 a includes a blocking member 510 a, anadjusting base 520 a, an adjusting sheet 530 a, an adjusting member 540a, an eccentric member 550 a and three screws 560 a. In this embodiment,two fixing holes 531 of the adjusting sheet 530 a are slot shaped. Theadjusting member 540 a includes an adjusting head 541 a, a fixing tube542 a and a pushing head 543 a. The adjusting head 541 a is rotatablyconnected to the pushing head 543 a by the fixing tube 542 a, and thepushing head 543 a pushes against the eccentric member 550 a. Theeccentric member 550 a includes a groove 552 a and an axis 553 a. Thegroove 552 a is arc-like, is opened on the eccentric member 550 a, andis correspondent to the adjusting member 540 a. The axis 553 a isprovided for pivotally disposing the eccentric member 550 a on theadjusting base 520 a. The axis 553 a opens a screw hole 554 a at itsside, and the screw hole 554 a is used for screwing the pushing head 543a. Two screws 560 a are through the fixing holes 531 a and are screwedto the axis 553 a of the eccentric member 550 a. Two screws 560 a areinserted through the adjusting holes 521 a and two slot-shaped fixingholes 531 a, and are screwed on two ends of the fixing tube 542 a. Theslot-shaped fixing holes 531 a is positioned in the adjusting hole 521 aby the screw 560 a, and the eccentric member 550 a is screwed by theother screws 560 a through the other two fixing holes 531 a of theadjusting sheet 530 a, so as to form a swingable angle. Therefore, therotating angle of the eccentric member 550 a and the position of theeccentric member 550 a can be adjusted by rotating the adjusting head541 a in the screw hole 554 a of the axis 553 a, incorporation with theslot-shaped fixing hole 531 a and the arc-like groove. Therefore, aninclined angle of the second blocking surface 551 a of the eccentricmember 550 a and an inclined angle of the first blocking surface 511 aof the blocking member 520 a can be adjusted, and thus the pedal strokeand the swing angle of the pedal 400 a can be changed.

FIG. 16A is a three-dimensional view showing a stepper 100 a accordingto one embodiment of the present disclosure; and FIG. 16B is a side viewshowing the stepper 100 a of FIG. 16A. In FIGS. 16A and 16B, theadjusting sheet 530 a (as shown in FIG. 14) is removed, and theadjusting member 540 a is integrally constructed. The adjusting member540 a is inclinedly disposed on the adjusting base 520 a. Because two ofthe adjusting holes 521 a are opened along a moving direction of theadjusting member 540 a and are elongated, the position of the eccentricmember 550 a can be adjusted by the elongated adjusting holes 521, andan inclined angle of the first blocking surface 511 a of the blockingmember 520 a can be adjusted, and thus the pedal stroke and swing angleof the pedal 400 a can be changed.

FIG. 17A is a schematic view showing a stepper 100 a according to oneembodiment of the present disclosure; and FIG. 17B is a side view of thestepper 100 a of FIG. 17A. In FIGS. 17A and 17B, the adjusting sheet 530a (as shown in FIG. 14) is removed, and the adjusting member 540 a isintegrally constructed. Because two adjusting holes 521 a are extendedhorizontally, the horizontal position of the eccentric member 550 a canbe adjusted by the adjusting holes 521, an inclined angle of the firstblocking surface 511 a of the blocking member 520 a can be adjusted, andthus the pedal stroke and swing angle of the pedal 400 a can be changed.

In sum, the stepper of the present disclosure has the followingadvantage.

(a) Reciprocately stamping functionalities can be obtained by using asimple structure of the linking rod and the adjusting mechanism.

(b) As to the up and down swing of the pedal, the structure of thelinking rod and the mechanism of the present disclosure is more stablethan the conventional linking structure utilizing lever principle andV-type swing.

(c) The pedal can swing up, down, left and right by incorporating thelinking rod, the inclined direction of the blocking member and theeccentric member of the adjusting mechanism.

(d) The corresponding axial distance of the second blocking surface ofthe eccentric member can be freely selected to adjust the pedal strokeand the swing angle.

(e) The adjusting mechanism can be freely adjusted to meet differentrequirements of the pedal stroke and the pedal swing for differentusers, and the inclined angles and positions of the first blockingsurface and the second blocking surface can be adjusted by adjusting theadjusting member, the adjusting base, the adjusting sheet and thescrews.

Although the present disclosure has been described in considerabledetail with reference to certain embodiments thereof, other embodimentsare possible. Therefore, the spirit and scope of the appended claimsshould not be limited to the description of the embodiments containedherein.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentdisclosure without departing from the scope or spirit of the disclosure.In view of the foregoing, it is intended that the present disclosurecover modifications and variations of this disclosure provided they fallwithin the scope of the following claims.

What is claimed is:
 1. A stepper, comprising: a base; a linking roddisposed on the base, wherein the linking rod comprises two ends thatare concentrically rotated with each other; two pedals, each of thepedals comprising: a pedal member; and a pedal arm connected to thepedal member, wherein the pedal arm is pivotally connected with one endof the linking rod for reciprocately raising or lowering the pedalmember; and two adjusting mechanism, each of the adjusting mechanismcomprising: a blocking member disposed on the pedal arm, the blockingmember comprising a first blocking surface; an adjusting base disposedon the base; and an eccentric member disposed on the adjusting base,wherein the eccentric member is rotatable around an axial center, theeccentric member comprising at least two second blocking surfaces, andthe two second blocking surfaces are separated from the axial center bydifferent distances, and the two blocking surfaces selectively resistthe first blocking surface; wherein when one of the pedals is loweredalong a gravity direction, one of the first blocking surfaces and one ofthe second blocking surfaces are inclined along the gravity direction tolink up one end of the linking rod, and the other end of the linking rodis concentrically rotated, the other one of the first blocking surfacesis resisted by the other one of the second blocking surfaces, therebyrotating and raising the other one of the pedals.
 2. The stepper ofclaim 1, wherein the first blocking surface is an arc surface.
 3. Thestepper of claim 1, wherein the first blocking surface is made fromelastic material.
 4. The stepper of claim 1, wherein the eccentricmember comprises three second blocking surfaces.
 5. The stepper of claim1, wherein the eccentric member comprises four second blocking surfaces.6. The stepper of claim 1, wherein, the base comprises: a centralportion configured to locate the two adjusting bases; an extensionportion extended vertically and outwardly from the central portion; andtwo side portions connected to two ends of the central portion, whereinthe two side portions are arranged in a shape of splayed arch; thelinking rod comprises a circle-center portion located in a center of thelinking rod, and the circle-center portion is pivotally connected to anouter end of the extension portion, thereby rotating the linking rod;and each of the two pedals comprises a pivoting portion, and each of thepivoting portion is integrally connected to the pedal arm and ispivotally connected to the two ends of the linking rod, thereby rotatingeach of the pedal relative to the linking rod.
 7. A stepper comprising:a base; a linking rod disposed on the base, wherein the linking rodcomprises two ends that are concentrically rotated with each other; twopedals, each of the pedals comprising: a pedal member; and a pedal armconnected to the pedal member, wherein the pedal arm is pivotallyconnected to one end of the linking rod for reciprocately raising orlowering the pedal member; and two adjusting mechanism, each of theadjusting mechanism comprising: a blocking member disposed on the pedalarm, the blocking member comprising a first blocking surface; anadjusting base disposed on the base; an eccentric member disposed on theadjusting base, wherein the eccentric member is rotatable around anaxial center, the eccentric member comprising a second blocking surfaceused to resist the first blocking surface; an adjusting member disposedon the adjusting base for adjusting a rotating angle or a position ofthe eccentric member; wherein when one of the pedals is lowered along agravity direction, one of the first blocking surfaces and one of thesecond blocking surfaces are inclined along the gravity direction tolink-up one end of the linking rod, and the other end of the linking rodis concentrically rotated, and the other first blocking surface isresisted by the other second blocking surface, thereby swinging andraising the other pedal.
 8. The stepper of claim 7, wherein theadjusting member is a plug.
 9. The stepper of claim 7, wherein theadjusting member is a bolt.
 10. The stepper of claim 7, wherein theadjusting base comprises a plurality of adjusting holes, and theeccentric member is pivotally disposed in the adjusting holes.
 11. Thestepper of claim 10, wherein the adjusting mechanism comprises: anadjusting sheet having a plurality of fixing holes; and a plurality ofscrews disposed through the adjusting holes and positioned in the fixingholes, and the adjusting member is selectively disposed through twofixing holes and two adjusting holes, thereby adjusting the eccentricmember by the adjusting member and the adjusting sheet.
 12. The stepperof claim 10, wherein the adjusting mechanism comprises: the adjustingmember disposed in one of the adjusting holes; two adjusting holes whichare slot-shaped; the eccentric member comprising a groove and an axis,wherein the groove is in an arc shape and is located in the eccentricmember, and the eccentric member is pivotally disposed on the adjustingbase through the axial center, and a screw hole is formed in a side ofthe axis corresponding to the adjusting member; and a plurality ofscrews screwed in two ends of the eccentric member and slidably disposedin the two adjusting holes.
 13. The stepper of claim 10, wherein theadjusting mechanism comprises: an adjusting sheet having a plurality offixing holes, wherein two fixing holes are slot-shaped; a plurality ofscrews disposed through the adjusting holes and positioned in the fixingholes, wherein one of the screws is screwed in two ends of the eccentricmember and slidably disposed in the slot-shaped adjusting holes; theeccentric member comprising a groove and an axis, wherein the groove isarc shaped and is located in the eccentric member, and the eccentricmember is pivotally disposed on the adjusting base through the axialcenter, and a screw hole is formed in a side of the axis for screwingthe adjusting member; and the adjusting member comprising an adjustinghead, a pushing head and a fixing tube, wherein the adjusting head isrotatably connected to the pushing head through the fixing tube, and thefixing tube is correspondent to two slot-shaped fixing holes and isconfigured for screwing the screws, and the pushing head is disposed tothe groove of the eccentric member and is screwed to the screw hole ofthe axis.
 14. The stepper of claim 7, wherein the first blocking surfaceis an arc surface.
 15. The stepper of claim 7, wherein the firstblocking surface is made from elastic material.